Is there a way to use renderman in blender?
There is now a public release of a Renderman plugin for Blender. Maintained in part by folks from Pixar.

Official intro to RenderMan for Blender: https://community.renderman.pixar.com/article/906/introduction-to-prman-for-blender.html

Also see PRMan for Blender Support thread:
https://renderman.pixar.com/forum/showthread.php?s=&amp;threadid=28298